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Finding the Fourth Proportional to 607.82, 838.62 and 386.69

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Solution

The fourth proportional to 607.82, 838.62 and 386.69 is: 533.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.82 : 838.62 = 386.69 : x
  2. Step 2: Convert to fraction form
    607.82/838.62 = 386.69/x
  3. Step 3: Cross multiply
    607.82x = 838.62 × 386.69
  4. Step 4: Simplify right side
    607.82x = 324,281.77
  5. Step 5: Solve for x
    x = 324,281.77/607.82
  6. Step 6: Final answer
    x = 533.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.